Does an ECM differ from a PCM?

Technology has continuously evolved at a rapid rate. Nowadays, petrol and diesel vehicles come with engines that have ECMs (Electronic Control Modules) and PCMs (Powertrain Control Modules) installed within them. The ECM and PCM control a lot of vital functions in the car.

Although there’s a slight similarity between the two, since both control some of the most vital functions in the car similarly, there is a considerable difference. Let’s take a look at the differences between an ECM and a PCM in this blog.

ECMs

The electronic control module is also referred to as the brain of a modern engine, and it functions by receiving electronic signals from different sensors. The ECM also sends command signals to actuators to keep your engine and vehicle performing optimally.

Functions on an ECM

Some of the functions your car’s ECM controls are:

• Air-fuel-ratio
• Fuel injection into the combustion chamber
• Ignition spark
• Throttle position
• Acceleration upon pressing the pedal

Problems Caused by Faulty ECMs

When your ECM malfunctions, you may experience the following issues with your car:

• Bad mileage
• Engine vibration
• Failure to accelerate despite pressing the pedal
• Engine not starting

PCMs

A PCM isn’t a single-unit module like an ECM and is found in engines that don’t have a separate ECM and a TCM (Transmission Control Module). PCMs control a variety of functions in cars. Let’s take a look at them here.

Functions of a PCM

Some of the functions PCMs control are:

• Alternator’s function in the charging system
• Emissions from the exhaust
• Engine temperature
• Idle speed
• Transmission

Problems Caused by Faulty PCMs

If your car’s PCM malfunctions, it may cause these problems:

• Low or high idle speed
• Jerk in gear shifts
• Overheating
• Excessive emissions

PCMs are not commonly found because, nowadays, ECMs and TCMs work independently. This is more beneficial for cars because if any PCM or TCM malfunctions, it can easily be repaired or replaced without affecting the other part.

If your ECM is malfunctioning, you can easily get it repaired or replaced by professionals at CATECM.

We are an ECM repair and replacement company and provide ECM repair and reprogramming within 24-48 hours. Moreover, we also have remanufactured ECMs that we can ship to you across the United States. All of our products and services come with a one-year warranty.

Call us now for further details.